function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annali del Museo Civico di Storia Naturale di Genova', 1],
    ['Aquarien und Terrarien Zeitschrift', 3],
    ['Aquarium Aqua Terra', 3],
    ['Biodiversity Data Journal', 1],
    ['E. J. Brill', 1],
    ['Ichthyological Exploration of Freshwaters', 11],
    ['Memoirs of the California Academy of Sciences', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Proceedings of the Zoological Society of London, B', 6],
    ['Raffles Bulletin of Zoology', 18],
    ['Revue suisse de zoologie', 1],
    ['Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen', 1],
    ['Zeitschrift für Fischkunde', 1],
    ['Zootaxa', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);